Firefighters stop run by Yosemite fire, keep it far from reaching grove of giant sequoias

The remains of a burned home lie in the Foresta community in Yosemite National Park in California on Tuesday, July 29, 2014. Fire crews gained ground Tuesday on two of the largest wildfires in California, lifting evacuation orders for about half the homes in the path of a blaze in Yosemite and redeploying firefighters battling another fire in the Sierra Nevada foothills east of Sacramento. (AP Photo/Al Golub) (The Associated Press)

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A burned home and pickup truck lie in the Foresta community in Yosemite National Park in California on Tuesday, July 29, 2014. Fire crews gained ground Tuesday on two of the largest wildfires in California, lifting evacuation orders for about half the homes in the path of a blaze in Yosemite National Park and redeploying firefighters battling another fire in the Sierra Nevada foothills east of Sacramento. (AP Photo/Al Golub) (The Associated Press)

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A plane drops fire retardant as firefighters battle a blaze in El Portal, Calif., near Yosemite National Park on Tuesday, July 29, 2014. Firefighters in the state are also battling another wildfire in the Sierra Nevada foothills east of Sacramento. (AP Photo/Al Golub) (The Associated Press)

YOSEMITE NATIONAL PARK, Calif. – A wildfire in Yosemite National Park made a new run that firefighters quickly stopped, and containment lines have kept it from threatening some treasured trees that are among the largest and oldest living things on earth.

The blaze made a run of about a half-mile in the Crane Creek area Wednesday, park officials said in a statement, but it was brought under control.

The fire remained about 10 miles from Merced Grove, one of three Yosemite stands of giant sequoias, towering trees that grow only on the western slopes of the Sierra Nevada and can live longer than 3,000 years.

Low humidity was likely to lead to an active night for the fire into Thursday, and thunderstorms brought the threat of lightning, the park's statement said.

With the exception of some smoke in Yosemite valley, the park itself was largely unaffected by the fire and remained open, Gediman said.

The fire was threatening about 50 homes that remained under evacuation orders. It has destroyed a home and a duplex and burned through more than 6 square miles since it began on Saturday. It was 34 percent contained.

Fire crews also were battling a blaze in Sierra National Forest about 60 miles northeast of Fresno that grew substantially late Tuesday and had spread across nearly 9 square miles. It was threatening about 20 homes, though they were not under mandatory evacuation orders, said Anne Grandy, a spokeswoman for the park.

Several campgrounds and cabins were evacuated and closed, the U.S. Forest Service said in a statement.

In Oregon, a firefighter battling a 100-acre blaze in the southern Cascade Range died in a fall while on a break. Authorities say he apparently lost his balance climbing over a rock and fell backward over a downed log, breaking his back.

In Washington state, officials were pleading with the public to stop donations for wildfire victims after community organizations were flooded with items. The largest wildfire in the state's history burned hundreds of homes and scorched hundreds of square miles.